package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.enity.Setmeal;
import com.itheima.reggie.enity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增套餐 , 并保存菜品关联信息
     *
     * @param setmealDto
     */
    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐基本信息
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        })).collect(Collectors.toList());
        //保存套餐和菜品的关联信息，操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);


    }

    /**
     * 删除套餐 同时需要删除套餐和餐品的关联信息
     *
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
       /* //删除业务实现的逻辑
        // 查询该批次套餐中是否存在售卖中的套餐, 如果存在, 不允许删除
        // 删除套餐数据
        // 删除套餐关联的菜品数据*/
        //select count(*) from setmeal where id in (1,2,3) and status = 1
        //查询套餐状态确定是否可以删除 禁售则可以删除否则不可以
        LambdaQueryWrapper<Setmeal> lqw = new LambdaQueryWrapper<>();
        lqw.in(Setmeal::getId, ids);
        lqw.eq(Setmeal::getStatus, 1);
        int count = this.count(lqw);

        //判断改套餐是否在禁售状态
        if (count > 0) {
            //不能删除则抛出一个业务异常
            throw new CustomException("该菜品正在售卖不能删除");
        }
        //如果可以删除  先删除套餐表中的数据 setmeal
        this.removeByIds(ids);
        LambdaQueryWrapper<SetmealDish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.in(SetmealDish::getId, ids);
        //删除关系表中的数据
        setmealDishService.remove(dishLambdaQueryWrapper);


    }





}
